Brake-shoe.



' H. JONES.

BRAKE SHOE.

Patented Jan. 18, 1916.

l/VVE/VTOR liar/ y Jo/zes.

- ATTORNEYS UNlTED ETATEE PATENT @EFKCE.

HARRY JONES, 0E MAENAH, NEW JERSEY, ASSIGNOR To AMERICAN BRAKE SHOE &FOUNDRY COMPANY, OF MAHWAH, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BRAKE-SHOE.

Application filed November 23, 1915.

T 0 all whom it may concern.

Be it known that I, HARRY Jones, a citizen of the United States, and aresident of lvlahwah, in the county of Bergen and State of New Jersey,have made and invented certain new and useful Improvements in BrakeShoes, of which the following is a specification.

This invention relates to brake shoes.

In certain types of brake shoes, and particularly those containing hardsections, the metal, during service, tends to tear off and granulate,and the resulting small particles act as an abradant and cause the bodyof the shoe to wear away in a rapid and uneconomical manner, and inaddition also cause the body of the shoe to wear with small heat checksprevailing throughout the entire wearing surface, all of whichmaterially reduce the serviceable life of the shoe. I have found bynumerous experiments that this tearing off and granulation of the hardmetal of the shoe may be entirely prevented, and therefore theserviceable life of the shoe materially lengthened by providing a material, incorporated in the body of the shoe, which, during service, willspread out and smear across the entire wearing face of the shoe, and,entering into the interstices or pores of the cast metal, will cause thesame to wear with a highly polished and burnished surface, and underwhich conditions the shoe operates at its maximum efliciency.

Other objects and advantages will appear as the description proceeds,wherein it is'to be understood that changes in the precise embodiment ofthe invention can be made within the scope of what is claimed withoutdeparting from the spirit thereof.

The preferred embodiment of my invention is disclosed in theaccompanying drawings, whereinz Figure 1 is a view in longitudinalvertical section of a brake shoe embodying the characteristic featuresof my invention; Fig. 2 is a view in top plan of the brake shoe with aportion of the body thereof broken away.

Referring specifically to the several views, the shoe thereinillustrated is formed with the usual type of steel back 5, upon whichthe body of the shoe is cast, and with the key-attaching lug 6, by meansof which latter the shoe is secured to a brake head. The

Patented Jan. 18, 1916.

Serial N0. 62,941.

body of the shoe includes the wearing sec 5 tions 7 8 and 9, which maybe formed on tirely of hard metal, or may contain local chilled areastherein, according to the type of shoe and the class of service which itis to perform. Interposed between the sections 7, 8 and 9, are thesupplemental sections 10 and 11, formed of a material which is adapt edto flake oil and smear across the entire wearing face of the shoe. Castgray iron, containing a high percentage of free carbon and graphite,forms an extremely eflicient material for these supplemental sections,lead and aluminum, and several other metals acting with eflicientresults.

I do not necessarily limit myself to a shoe wherein the supplementalsections are interposed between the wearing sections, nor to thespecific arrangement illustrated in the several figures, it being onlynecessary that the supplemental sections be of such extent andarrangement that the material of which they are composed will spread andsmear across the entire face of the shoe, and,

' entering into the interstices and pores thereof, cause the shoe towear with a highly polished and burnished face.

What I claim is:

1. A brake shoe comprising wearing sec tions and a supplemental sectionextending entirely across the body of' the shoe and formed of a materialadapted to smear along the wearing surface of the shoe and cause thesame to wear with a high polish.

2. A brake shoe comprising wearing sections of gray cast iron containinga high percentage of free carbon, extending entirely across the body ofthe shoe and adapted to cause the same to wear with a high polish.

3. A brake shoe comprising a wearing sec tion of hard metal, and asupplemental section of gray cast iron containing a high percentage offree carbon and extending entirely across the body of the shoe and substantially equal in thickness to that of the wearing sections.

Signed at Sulfern in the county of Rockland and State of New York this16th day of November A. D. 1915.

HARRY JONES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of P nt Washington, D. 0."

